Tina Nixon walked by the playground at Washington Park less than 24 hours after a teenager was shot and killed there.

"I really don't know what to make of it. It angers me," Nixon said.

Nixon said she exercises there daily and that type of violence doesn't belong anywhere, especially in a peaceful park.

"It's a park. You should be able to come here, walk, run, bring your kids here without having to be scared that somebody's going to get shot," Nixon said.

Chia Yang said she could've easily been near the playground with her children when bullets were fired.

"It's telling us that we have to be careful where we go, what we do, and it's just not fair in a community that people continue to do this," Yang said.

A representative of the Martin Drive Neighborhood Association said the association has been working hard to make the area safe for people to come and enjoy the park, and said a violent tragedy like this is a setback.

"We just continue to work together, I think it's really important that people know don't fear the park. We can still go there. It is a safe place," Pat Mueller said.

Mueller said they take pride in their community involvement and are even working with a new grant aimed at reducing violent crime, but she said repairing the park's image after this shooting may take time and effort.

Mueller said the neighborhood association may also organize a rally or memorial to help heal the community.

Police said they know who they are looking for in Gardner's shooting but no one is in custody.

HEARING FROM THE FAMILY OF A TEENAGER KILLED IN BROAD DAYLIGHT AT A MILWAUKEE PLAYGROUND. 17-YEAR-OLD DONALD GARDNER DIED ON THE SCENE YESTERDAY -- IN WASHINGTON PARK. NEW AT SIX -- WISN 12 NEWS' ABE LUBETKIN IS THERE -- AND ABE, HIS SISTER SAYS HE WAS TRYING TO TURN HIS LIFE AROUND. THIS IS WHERE DANIEL GARDNER WAS WALKING YESTERDAY WHEN HE WAS SHOT AND KILLED. FAMILY MEMBERS SAY HE'D JUST DECIDED TO GET HIS LIFE ON-TRACK. PRECIOUS TAYLOR -- FOR HIM TO HAVE HIS LIFE TAKEN LIKE THAT -- IT'S AN UNBEARABLE FEELING. AN UNBEARABLE FEELING FOR 25-YEAR- OLD PRECIOUS TAYLOR -- THE SISTER OF 17- YEAR-OLD DANIEL GARDNER. HE WAS KILLED AT 2:30 MONDAY AFTERNOON WHILE WALKING WITH HIS GIRLFRIEND AND HER YOUNG RELATIVE IN THE PLAYGROUND AT WASHINGTON PARK. IN ADDITION TO TAYLOR, GARDNER LEAVES BEHIND A 10-YEAR-OLD SISTER, OTHER SIBLINGS, STEP- SIBLINGS, AND A MOTHER WHO'S BATTLING LUNG CANCER. PRECIOUS TAYLOR -- SHE CRIED HERSELF TO SLEEP LAST NIGHT AND WOKE UP CRYING. I CRIED MYSELF TO SLEEP AND WOKE UP CRYING. MY LITTLE SISTER -- SHE DID THE SAME THING. EVERYBODY'S JUST FEELING SO SO TERRIBLE. GARDNER'S SISTER SAID SHE DID NOT KNOW WHY SOMEONE WOULD WANT TO KILL HER BROTHER... WHO, SHE SAID, WAS TRYING TO TURN HIS LIFE AROUND. PRECIOUS -- HE WAS TALKING ABOUT ENROLLING BACK IN SCHOOL BECAUSE HE HAD STOPPED GOING FOR A WHILE. HE WANTED TO GET INTO CHURCH. AS POLICE CONTINUE TO INVESTIGATE GARDNER'S DEATH, HIS SISTER IS THINKING OF THE LIFE EXPERIENCES SHE WON'T SHARE WITH HIM. PRECIOUS -- I CAN'T CELEBRATE HIS 18TH BIRTHDAY WITH HIM...A HIGH SCHOOL GRADUATION WITH HIM..HAVING HIS FIRST CHILD. I CAN'T DO THAT BECAUSE HE'S NO LONGER HERE. POLICE AREN'T SAYING MUCH ABOUT THEIR SEARCH FOR A SUSPECT. I JUST TOUCHED BASE WITH MILWAUKEE POLICE...WHO TOLD ME RIGHT NOW THEY DO NOT HAVE A SUSPECT IN CUSTODY. LIVE AT WASHINGTON PARK, ABE LUBETKIN, WISN 12 NEWS. DISTURBING NEW

Gen. David Petraeus pleaded guilty to federal charges Tuesday to end a probe into whether he provided classified information to his mistress when he was CIA director, according to a U.S. official briefed on the matter.